Four Democrats have joined a slowly growing group calling for impeachment proceedings against President Donald Trump, including a close ally of House Speaker Nancy Pelosi and a Democrat who flipped a Republican district.

The 18-pound volume has a cover of hand-tooled leather and gilt lettering, and is inscribed to the president from “the Ladies of the Citizens Volunteer Hospital of Philadelphia.” Historians believe Lincoln received it on June 16, 1864.

The body of Yingying Zhang has never been found, but the vehicle she was last seen entering was allegedly driven hundreds of miles in the days before and after her disappearance. More from the high-profile trial of Brendt Christensen.